In 2007, for the first time in the history of humanity, the number of the earth's urban inhabitants exceeded its rural population. Megalopolis presents six documentaries that focus an equal number of sprawling cities - Los Angeles, San Paolo, Cairo, Shenzhen, Karachi and Tokyo - examining both the visible and the invisible cities while taking an in-depth look, against the backdrop of day-to-day life, at the conflicts and passions of a futuristic scenario which has already come to pass.